| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 3 |
0.3%
|
| 0 | Never | 1152 |
96%
|
| 1 | Only once | 25 |
2.1%
|
| 2 | A few times | 11 |
0.9%
|
| 3 | Often | 4 |
0.3%
|
| 9 | Don't know | 5 |
0.4%
|
| 998 | Refused | 0 |
0%
|